This TS specifies the protocol details of service level interworking between Instant Message (OMA-TS-SIMPLE_IM) or Chat Session (OMA-TS-CPM_Conv_Fnct) using the 3GPP IP Multimedia CN subsystem and
the Short Message Service over both legacy CS/PS network as specified in the TS 23.040 and a generic IP
Connectivity Access Network (IP-CAN) as specified in the TS 24.341.